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6 Sheets--Sheet 1.

(No Model.)

M. H PEARSON. SEWING MACHINE.

No. 278,592. Patented May'29, 1883.

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(No Model.)

No. 278.592. Fey 2 l I AIN nah; Q

M, H PEARSON.

SEWING MACHINE.

Patented MayZQ, 1883.

6 Sheets-Sheet 2.

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M. H PEARSON;

SEWING MACHINE.

N0..'2'78,592. Patented May 29,1883.

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(No Model.) 6 Sheetssheet 4.

M. H. PEA RS ONQ SEWING MACHINE. No. 278,592. Patented May 29,1883.

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M HPEARSON.

SEWING MACHINE- No. 278,592. I Patented a 29,1883.

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(No Model.) 6 SheetsSheet 6.

M. H PEARSON.

SEWING MACHINE.

No. 278,592. v Patented M8 129, 1883 Wneww their proper relative position.

UNITED STATES ASSIGNOR TO JOHN OFLAHERT Y; OF MONTREAL, CANADA.

SEWINGrMA QHINE.

SPECIFiGATfQN forming part of Letters Patent No. -27s,59'2, dated May 29, 1883.

Application filed il'anuaryfll, 1882. (No model.) Patented in England January 1?, 1882, No. 255.

To all whom it may concern This invention has reference to the constructionand arrangement of a sewing-machine more especially adapted for stitching leather with waxed threads; but the inventionmay also he used without waxing the threads, if

desired, and may be used to stitch materials other than leather, the machine being adapted rather more for heavy than light work, although it is capable of doing the latter.

The improvements in sewin g-in achines forming the subject of the present application or invention will be fully set forth and claimed in the following description and claims.

In the drawings hereunto annexed similar letters of reference indicate like parts, and Figure 1 is a side elevation of the general arrangementof a machine embodying my invention, and showing the parts of theniachine in Fig. 2 is a front elevation of Fig. 1. Fig. 3 is a plan of the levers by which the presser-bar and presser-foot Fig. 4 is a front areoperated and adjusted. view of cam bywhich thelevers shown in Fig. 3 are operated. Fig. 5 is a side elevation of i Fig. i. Fig. 6 is a front view of the cam by which the lever for retaining the presser-bar and presser-foot is operated. Fig. 7 is a side elevation of thecam shown in Figijifi. Fig. 8 is a front elevation of the end of the lever by which the presser-bar and presser-foot are retained. Fig. 9 is an end elevation of Fig.8. Fig. 10 is a rear elevation of Figs. 8 and 9. Fig. 11 is afront elevation of the swinging, arm which guides and supports the slide carrying the awl, showing also the tension. Fig. 12 is a side elevation of Fig. 11. Fig. 13 is a plan ofFig. 11. Fig. 14 is a front elevation of the slide in which is secured the awl, being the slide received within and guided by the swinging arm. Fig. 15 isa hack elevation of slideshown in Fig. 14. Fig. 16 is a plan of Fig. Fig. 17 is a side to which the 50 presser-foot is attached. Fig. 18 is a front elevation or Fig. 17. Fig. '19 is a plan of Fig. 17; Fig. 20 is a front elevation of the cam-disk by which the swinging arm is operated, also showing the crank-pin by which the slide car-,

rying the a wl is moved up and down in the said swinging arm. Fig. 21 is-a front view of the adjustable head to which the swinging 1 arm and other parts, as will be hereinafter described, are attached. Fig. 22 is a side eleva-' tion ofFig. 21. Fig. 23 is a plan of Fig. 21.

showing the cam projections by which the looper-lever is operated. Fig. 29 is a back elevation of Fig. 20, showing the cam projections by which the looper-lever is operated. Fig. 30is a front elevation ofthe slide by which the hook is carried and openated. side elevaion of Flg. 30. Fig. 32 is aplan of Fig. 30. Fig. 33 is a plan of needle-plate, sewing-plate, and sub-frame, in which sub-frame the shuttle is carried. Fig13l is Fig. 33-reproduced with needle-plate and sewingplate removed, also shuttle removed. Fig. 35 is a cross-section of Fig. 34 on line as or. a plan of the shuttle inverted. Fig. 37 is a plan of the shuttle right side up. Fig. 38 is a sideelevation of-sliuttle..Fig.39 is a crossscction on line 3 g Fig. 37. Fig. 40 isa view showing the action, the l'ooper with the needle or hook. Fig. 41 is a plan of the parts situatedbelow the sub-frame by which the shuttle is actuated. v

LetterA is theframe-work for holding the workin g parts in their proper relative positions.

B is the lower main driving-shaft, and G the upper main driving-shaluyB being carried in hearin gs D D, and (l in 'bearin and neck F, of the adjustable head G. This adjustable head is shown more particularly in Figs. 21, 22,"

F, so that by this arrangement the adjustable Fig. 31 is a i so is head G may be adjusted to set it farther forward or backward by passing the neck F farther in or farther out of the said opening in A, which receives it, and the adjustable head may also be adjusted by turning it upon F, as on a'pivot, to set it longitudinally vertical or adjust it to a slight inclination, if desired. Through the neck F a hole, H, is bored, forming the aforesaid front bearing of the shaft O. As shown by dotted lines in Figs. 1 and 2, on the ends of these shafts B and O are securedone on eacha gear-wheel,1,both of which intermesh with an intermediate gear-wheel, K, which revolves on a pivot, L, secured in a socket, M, formed on the frame A. The gearwheel K is revolved by means of acrank-pin, N, andconnecting-rod O, operated by any desired and suitable ordinary means; or power may be applied to K or attachment thereofin any ordinary manner to cause it to revolve. The gear-wheelsI being equal, the shafts B and O are caused to revolve equally by the gearwheel K. P is a fly-wheel, which may be used to give momentum to the working parts.

On the front end of the shaft 0 is secured a cam-disk, It, the general outline only of which is shown in Figs. 1 and 2; but its configuration is more particularly shown in Figs. 20,28, and 29. The front face of It is fiat, having a crankpin and roller S (the roller being carried on the said crank-pin) set upon it. The periphery slightly deviates from a true circle; as shown by the dotted line in Fig. 20, which indicates the true circle. By this deviation of the periphery the swinging arm is operated to give it the feed motion required, all of which will be hereinafter described. On the back side of R are formed two projections, T and V. The projection T is provided with a peripheral projection, a, and surface-projection b, and surface-depression c. The projection B is provided with a peripheral projectiomd, only, and by this peculiar formation of the back of the cam B the looper-lever, which will be hereinafter described, is operated.

On the shaft 0 is secured the cylinder A,

provided with a cam-groove, c, with which a pin of the arm fengages. This arm is in the ordinary way made in one with a pivot or journal carried in the bearing g, so that by the revolutions of the cylinder A the cam-groove ccauses the armf to vibrate, as also the takeuplever h, which is made in one with the arm f. A further description of this lever will be hereinafter given.

t is a cam secured upon the shaft 0, for op- I crating the levers 7c and Z, which, by means of the connecting-link m and spring 6 operates the slide-bar 0, to which the presser-foot p is attached.

' q is a cam secured on the shaft 0, by which the leverris operated. This lever byits peculiare-onstruction is enabled to hold the presser-bar by.friction at the required position of elevation, allot which will be hereinafter fully described.

On the shaft B is secured a cylinder, a, provided with a cam-groove, b with which the pin 0 of an arm or lever, d engages. This arm or lever is made in one with a second arm or lever, 6 having at its end a segmental toothed gear-rack,f The two arms orlevers d and c are made in one, forming a rather acute ordinary bell-crank, the whole of which will hereinafter, for shortness and clearness, be called thebell-crank0 Thisis provided with an eye which is pivoted on the center hearing or trunniomg The said bearing gis formed on a sub-frame, k attached by screws 41 and (see Figs. 1, 2, and 33,) to the frame A. The holes for these said screws are slightly elongated to allow of an amount of adjustment back and forward of the position of the said subframe. The front end ofthe sub-frame is provided with acircular recess, k see Figs. 34 and 35, in which the segmental shuttle slides back and forth. The sub-frame is provided with a central opening and projectionmz in which the pin Z is fitted to rotate. On the lower end of the pin 1 is secured a gear-wheeh'n which intermeshes with the segmental rack f so that by the revolutions of the shaft B, and by means of the cylinder a and cam-groove b bell-crank 6 and rack f the pin 1 is caused to turn on its axis about or a little more than a quarter of a revolution. The head of the pin 1 is provided with two arms or projections, 0 and 19 which engage with the shuttle when it is in its place in the groove 70 as shown in Fig. 37, one pushing the shuttle forward and theother drivingitback. The position of the arms 0 and 19 as shown in Fig. 34, is that of about mid or halt'stroke.

g is a cylinder, having a cam-groove, 0' with which the pin .9 of an arm, t, of a rockshaft, 0 engages. This rock-shaft is provided with a second arm, a which is attached by a link, b to'the pin 0 secured in a projection, 6 of the slide 61 which is guided in the front lower part of the frame A. In the said slide the hook or needle f is held.

Having thus as above given ageneral statement or review of' what the more important parts of the machine are, I will now give a more full and complete descriptionot' the construction and operation of them in so far as it may be necessary, together with a description of the lesser parts.

Beginning with the adjustable head G, and in addition to what has already been said on this part of the machine, I would state that its upper extremity is provided with an eye, 9 to receive the pin k by which the swinging arm is attached to it. (See Figs. 1, 2, 21, 22, and 23.) The lower part of the adjustable head G is provided with a groove, *3, and a further recess, k is formed within the body of G.

Z is a hole bored into the side of G, situated, as shown, in relation to the groove i and recess k This hole does not pass completely through G, but is reduced and screwed at the bottom end to receive the screw m (Shown inFig. 24 To thisscrew is'fitted a die, 71/, having a projection, so that when this die is in place its body projects into the recess k while its projection 0 sticks out in the groove i It will be observed that n is tapered so that it may have an amount of play in the recess lo ()n 0 the looper-lever (seeFigs. 26 and. 2.7) is placed.

g is an openin g fora projectionof the looperleverto. pass through. 'One side of G has a further p'rojection,, p in which] isformed a guidep for thepresserfoot bar 0. p a s is a depression or cutting away of the body 1 of G to give room for the upper extension of the looper-lever. The contour of this is shown by the dotted curvedline 8 in Fig. 22.

Z is an opening to receive within it a rockshaft, Z, having at one end the arm Z and to its other end is secured the lever Z the use of which parts will be hereinafter described.

The'looper-lever t is shown in Figs. 26 and 27. It consists of aneye, a, which is fitted to the projection 0 Fig. 25, so that by the turningof the eye a on this projection and by the turning of the die n on the pin m the lever t is able to move about in a limited de gree as if it weresustained in place by a ball and socket or universaljoint.

l) is an upper arm minates in a knob, 0.

or extension, which ter- This is caused to press upon andagainst the projections T and V by a spiral spring, (1, attached to the projection 1 e, which passes through the opening (1 This will be understood by an examination of the relative position of the parts shown in Fig. l and the detail figures. The other end of the spring d is attachedto a stationary projection on G in such a position that thespring is situated diagonally, as indicated by thedotted line f, Fig. 21. This causes the arm and knob of i the looper-lever to press not onlyforward upon the surface of T, but also against the periphery of V, so thata corresponding vibration of the-lever t is caused by the hereinbeforedescribed configuration otTT and V, as shown in Figs. 28 and 29. This causesthe end of V, the lever totperform a motion somewhatin the form of a circle or ellipse at each revolution of the shaft 0 and disk R. The lower end of the lever i terminates in a socket, h, and screw z"*, to receivewithin it an extension, provided with an eye, for the upper or needle threadto pass through, so that this thread is by k cast round the hook or needlef at every revolution, the parts being timedto do this whenf is raised, as shown in Fig. 40.

As'hereinbeforestated, the swinging arm It is attached by a pin, If, to G. It swings close in front of the surfaces 1 of thelower part of G. The construction of k is shown by Figs. 11, 12, and 13. It consists of an eye, m, for thepin h to pass through, and a bar, 71/, extending downward. This barhas upon ita longitudinal rib, 0 which, with a supplementary piece, 9 attached by screwsp, i'orm f placed on the neck, the said block will be and-move up and .down in. screwsp vided i'or sition. Y

8* is a slot-opening formed in W and t is a projection to which is pivoted a roller or pulley, a which rolls upon the periphery ofthe cam or disk R and causes the arm in to swing in the one direction, while the spring b (see Fig. 2,) attached to p by a screw inserted in the hole 0 (see Fig. 22,) presses between the said part p and swinging arm k and causes it to swing in the other direction. This swing of the arm is so timed that it will take place when the awl-slide is down and the awl in the material to be stitched, and gives the feed re quired for the material to be movedforward for each stitch. That the length of the stitches may be adjusted as desired-4hr the cam configuration of the disk, as shown, (see Fig. 20,) gives the longest stitch to be made by the machine-a set-screw, d attached by a bracket, 6 is provided. By adjustment of this screw the swingof the arm 7;" will be reduced any 0 desired amount, thereby adjusting the length of the stitches. f is a lock-nut on the screw (1 for securing it in position.

g is an ordinary tension attached on the end of 19, between the plates of which the needlethread is brought. There being nothing novel about it, it is not necessary to describe it further. This tension is left out in Figs.-1 and 2, because it would obstruct in some measure the illustration of those parts that require more particularly to be shown. The spool having the needle-thread upon it is placed upon the spindle 71.

The awl-slide, whic'h is guided by the swinging arm is, is shown in Figs. 14, 15, and 16. It consists of a bar, '5 configurated to fit the dovetaili'ormed by 0 and g4 At its lower extremity it has a projection, W. In this is formed a V-shaped groove, m situated longitudinally with the bar 71 Tnis, with the cover a attached by screws, as shown, forms a clamp by which the awl 0 is secured to the said bar.

To the back of i is attached aneck, p of suitable width -to slide freely in the slot s :15 (See Fig. 11.) The depth of this neck is shown by thedotted lines in Fig. 14. The length of the neck is a very small amount greater than the thickness ofthe swinging bar a, so. that a block, 1 may be attached on the neck and move up and down with the bar Without touching the back of the bar nflfor it will be easily understood that when the bar 2' is placed in position between the guides 0 and Q and the neck 10 placed on the back of it, and the block The holes for the are elongated, and screws 1* are prosett-ing up and maintaining g in poat the back of it. These three parts, ,12 and (1 are united together by screws 1", which pass through the three, as shown, and ordinary steady-pins maybe further used to prevent any change of position, if desired.

a dovetail groove forthe awl-slideto be guided Although, as above stated, the threejustthread of a screwed pin, h

' mentioned parts are described as separate, yet

p and g could be made in one, if desired, or i and 19 may be made in one, if desired; but this last-mentioned construction would give greater-trouble when these parts of the machine have to be taken asunder and put together.

In g a com pound curved groove,s is formed of such depth and width as to fit the crankpin and roller S of the disk R. The cross-section of this groove is rectangular.

From the above it will be seen that, as the disk R and crank-pin S revolve on the axis of the shaft 0, the slide i is caused to move up and down vertically the amount of the diameter of the circle described by the center of the crank-pin S, and that the said crankpin travels in thegroove an 'tqual horizontal amount. Therefore, a certain amount of timing or adjustment of the speed of the vertical up and down strokes of the bar i is obtained by the peculiar set and configuration of the groove 8 Having now described the construction and operation of the mechanism by which the awl is operated, I will now describe that for the presser-foot.

As hereinbefore stated, the presser-foot is attached on the slide-bar, O'Figs. 17, 18, and 19. This slides and is guided in the projection and 0 on Gr, Figs. 21 and 23. The bar 0 is provided with ajournal, t screwed into it, by whichthe lower end of the connectinglink m is attached to it. A slotted opening, a, is formed in its body, and it is provided with a pin and roller, b at the top, as shown. The upper end of the link at connects with a screwedjournal-pin, 0 Figs. 1, 2, and3, screwed into the end of the lever l, which lever is pivoted on the journal-pin d screwed into the frame A in the position shown. On this pin is also pivoted the lever 70, provided with a projection, in which is secured a roller, 6, to engage with the cam t',which operates these levers.

, Thelevers land it being separate, the one would not operate the other unless aconnection were made between them, and this connection must be an adjustable one to cause the bar 0 and presser-foot pto work at a higher or lower level as required for different thicknesses of material to be stitched by the machine. The said adjustable connection of the said levers is obtained by providing the lever with an eye, f and the lever l with alug, g. The eye J has a screwed opening fitted to agree with the To prevent the screw from beingjournaled in the opening in 9 through which it passes, this opening is elongated the required amount forthat purpose, as indicated by dotted lines in Fig. 3.

To keep the presser-foot down and the pulley c pressed upon the periphery of the cam 'i, a pow erful spring, i is provided. This has its upper end placed upon the outer projection of the pin 0, and lower end attached to the book of a screwed spindle, 70 which passes through a projection, 1 attached on the under 4 a was side of p, a thumb-nut, m being provided, by which-the tension of the spring may be adjusted.

In addition to moving the bar 0 and presser-foot up and down, as above described, it is desirable that it should be held in position during the time that the awl is being withdrawn from the material being stitched by a further mechanism, which grips the bar in. position, and thus prevents the upward pull of the awl from overcoming the tension of the spring i for should this take place the awl might not be drawn out clear of the material at the required time.

To enable the presser-foot to be readily raised by hand when the machine is stationary, the arm Z rock-shaft Z, and lever Z are provided, (see Figs. 1 and 2,) and that the presser-foot may remain raised without holding the handle Z by the hand all the time, anotch, Z ,.is--cut in the side of the frame A to engage the lever Z with. I Any desirable ordinary means being provided-such as a notch or spiral springfor holding the lever Z in a raised position when it is not desired to act upon the presser-foot.

As already mentioned, the mechanism to secure the presser-foot consists of the cam q and lever r, Figs. 1 and 2, which is provided with a roller, nflatitsupperextremity, which, in the ordinary way, engages with the said cam. The lower extremity of the lever is provided with ajournahp, on its front side, and on its back side with a flat projection, g, which, as shown in Figs. 9 and 17, is received within the slot a of the bar 0. The projection g terminates in ajournal Thisis received within a suitable bearing or recess formed for it in 19 (see Fig. 9,) while the outer journahp, is carried in a bracket, s attached on the front side of 10 as shown in Figs. 1 and 2. Now, as shown in Fig. 17, the projection g nearly fills the slot a so that if the lever i" is turned a very small amount downward two of the edges ot'q come with great force upon the surfaces of the slot and hold the bar 0 rigidly in position. The force with which the projection acts upon the bar 0 will be due to the amount of tension of the spring i which keeps the roller n pressed on the periphery of the cam q..

In addition to the hereinbefore given description of the slide 01 by which the hook or needle f is carried, it only remains to say that a clamping device, a, is formed in connection with. the bar d by which the hook or needle is grasped. This is substantially the same as that fully described aboveforsecuring the awl. It will be observed that in the front part of the sub-frame 7L2 an opening, a, is formed over the bar d b is the needle-plate, having an opening, 0 for the needle or book f and awl 0" to pass through.

c is the work-plate, or plate upon which the body of the work rests. .Under a portion of these plates is secured the guard d to form a their proper relative position.

UNITED STATES ASSIGNOR TO JOHN OFLAHERT Y; OF MONTREAL, CANADA.

SEWINGrMA QHINE.

SPECIFiGATfQN forming part of Letters Patent No. -27s,59'2, dated May 29, 1883.

Application filed il'anuaryfll, 1882. (No model.) Patented in England January 1?, 1882, No. 255.

To all whom it may concern This invention has reference to the constructionand arrangement of a sewing-machine more especially adapted for stitching leather with waxed threads; but the inventionmay also he used without waxing the threads, if

desired, and may be used to stitch materials other than leather, the machine being adapted rather more for heavy than light work, although it is capable of doing the latter.

The improvements in sewin g-in achines forming the subject of the present application or invention will be fully set forth and claimed in the following description and claims.

In the drawings hereunto annexed similar letters of reference indicate like parts, and Figure 1 is a side elevation of the general arrangementof a machine embodying my invention, and showing the parts of theniachine in Fig. 2 is a front elevation of Fig. 1. Fig. 3 is a plan of the levers by which the presser-bar and presser-foot Fig. 4 is a front areoperated and adjusted. view of cam bywhich thelevers shown in Fig. 3 are operated. Fig. 5 is a side elevation of i Fig. i. Fig. 6 is a front view of the cam by which the lever for retaining the presser-bar and presser-foot is operated. Fig. 7 is a side elevation of thecam shown in Figijifi. Fig. 8 is a front elevation of the end of the lever by which the presser-bar and presser-foot are retained. Fig. 9 is an end elevation of Fig.8. Fig. 10 is a rear elevation of Figs. 8 and 9. Fig. 11 is afront elevation of the swinging, arm which guides and supports the slide carrying the awl, showing also the tension. Fig. 12 is a side elevation of Fig. 11. Fig. 13 is a plan ofFig. 11. Fig. 14 is a front elevation of the slide in which is secured the awl, being the slide received within and guided by the swinging arm. Fig. 15 isa hack elevation of slideshown in Fig. 14. Fig. 16 is a plan of Fig. Fig. 17 is a side to which the 50 presser-foot is attached. Fig. 18 is a front elevation or Fig. 17. Fig. '19 is a plan of Fig. 17; Fig. 20 is a front elevation of the cam-disk by which the swinging arm is operated, also showing the crank-pin by which the slide car-,

rying the a wl is moved up and down in the said swinging arm. Fig. 21 is-a front view of the adjustable head to which the swinging 1 arm and other parts, as will be hereinafter described, are attached. Fig. 22 is a side eleva-' tion ofFig. 21. Fig. 23 is a plan of Fig. 21.

showing the cam projections by which the looper-lever is operated. Fig. 29 is a back elevation of Fig. 20, showing the cam projections by which the looper-lever is operated. Fig. 30is a front elevation ofthe slide by which the hook is carried and openated. side elevaion of Flg. 30. Fig. 32 is aplan of Fig. 30. Fig. 33 is a plan of needle-plate, sewing-plate, and sub-frame, in which sub-frame the shuttle is carried. Fig13l is Fig. 33-reproduced with needle-plate and sewingplate removed, also shuttle removed. Fig. 35 is a cross-section of Fig. 34 on line as or. a plan of the shuttle inverted. Fig. 37 is a plan of the shuttle right side up. Fig. 38 is a sideelevation of-sliuttle..Fig.39 is a crossscction on line 3 g Fig. 37. Fig. 40 isa view showing the action, the l'ooper with the needle or hook. Fig. 41 is a plan of the parts situatedbelow the sub-frame by which the shuttle is actuated. v

LetterA is theframe-work for holding the workin g parts in their proper relative positions.

B is the lower main driving-shaft, and G the upper main driving-shaluyB being carried in hearin gs D D, and (l in 'bearin and neck F, of the adjustable head G. This adjustable head is shown more particularly in Figs. 21, 22,"

F, so that by this arrangement the adjustable Fig. 31 is a i so is The machine is heated in all parts requiring it in the ordinary way by gas-jets when hard-' wax threads are used.

The shuttle will be provided with a cop of thread waxed or not, as desired.

' What I claim, and wish to secure by Letters Patent, is as follows:

1. The combination of an adjustable subframe, hZhavin g curved groove kZguard-plate d needle-plate I), provided with opening 0 with curved shuttle and needle or hook f and pin 1 having arms 0 and 19, substantially as described.

2. The combination of revolving cylinder having cam groove b bell -crank e rack f wheel a, pin l having arms 0 19 with an adjustable sub-frame having curved groove k provided with a correspondingly-curved shuttle, the whole constructed and providing an adjustable shuttle, substantially as described.

3. The combination of the cam 71, levers k and Z, having an adjustable connection'with each other, as described, link m, spring i presser-bar O, and presser-foot p, substan- 2 5 tially as shown, and for the purposes set forth.

4. The combination-of the cam q,- spring t lever r, having projectionq and bar O,pro-

6. The combination of the cam-disk R, havingpin S, swinging arm 70 provided with roller a", slide i holding the piercing and feeding awl, and block 1 provided with groove 3 the whole constructed, arranged, and operating substantially as described.

7. The combination of the take-up lever h,

operated as described, bracket 0 spiral spring 8 adjustable stops r and rod g having eye a, substantially as described.

MARSHALL HENRY PEARSON. Witnesses: W

4 WILLIAM J. GREEN, HENRY S. LEUTY,

Clerks to Messrs. Teale d3 Appleton, Solicitors,

Leeds. 

